7.2 FPS Pocket Quake on new Xscale

by **Dan East** » Jun 7, 2002 @ 10:34pm

I don't know what can be causing such poor performance. It has been said that the XScale doesn't have a floating point processor. When you build a Pocket PC app the floating point emulation code is included directly in the application. I am only guessing, but perhaps the floating point emulation library designed for ARM behaves poorly on XScale. Even if XScale (or any other Pocket PC) did have a processor supporting floating point, PQ would not make use of it, since the compiler integrated the floating point emulation into PQ when I built it. Further, perhaps ARM compiler optimizations actually hurt performance on XScale devices.

Dan East

by **Jadam** » Jun 7, 2002 @ 10:37pm

... its probally his GAPI, its compiled for the SA1110 suport chip LCD controller, but the XScales use new ones with 256kb Vram

by **Got KarmA?** » Jun 7, 2002 @ 11:27pm

Lol makes me happy I didn't just go out and buy one :-)

by **Dan East** » Jun 7, 2002 @ 11:32pm

A very, very small percentage of the CPU is used for blitting the frame out to the display. If I omit the display blit entirely PQ doesn't even pick up 1 additional FPS.

Dan East

by **TechMage** » Jun 8, 2002 @ 1:54am

by **Robotbeat** » Jun 8, 2002 @ 2:48am

by **Robotbeat** » Jun 8, 2002 @ 2:49am

by **Robotbeat** » Jun 8, 2002 @ 4:18am

7.2 FPS Pocket Quake on new Xscale

7.2 FPS Pocket Quake on new Xscale

Sort

Forum Description

Moderators:

Forum permissions